Filter Comparison

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Full Set

1+1

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Twin Set

2+2

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Full Set + Extra Filters

3+1

Replacements

1 Replacement

2 Replacements

3 Replacements

Best For

A single, straightforward replacement

Two, cost-effective replacements

More sediment-heavy water or those who want extra longevity

What's Included

1 Filter Cartridge #1 (White) and 1 Filter Cartridge #2 (Black)

2 Filter Cartridge #1 (White) and 2 Filter Cartridge #2 (Black)

3 Filter Cartridge #1 (White) and 1 Filter Cartridge #2 (Black)

How to Replace

Replace both filters once

Replace both filters twice

After replacing both filters once, replace just the white filters 2 more times—for a total of 3 replacements

Cost per Replacement

$29.99

$24.99

$19.99

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Full Set

1+1

Replacements

1 Replacement

Best For

A single, straightforward replacement

What's Included

1 Filter Cartridge #1 (White) and 1 Filter Cartridge #2 (Black)

How to Replace

Replace both filters once

Cost per Replacement

$29.99

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Twin Set

2+2

Replacements

2 Replacements

Best For

Two, cost-effective replacements

What's Included

2 Filter Cartridge #1 (White) and 2 Filter Cartridge #2 (Black)

How to Replace

Replace both filters twice

Cost per Replacement

$24.99

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Full Set + Extra Filters

3+1

Replacements

3 Replacements

Best For

More sediment-heavy water or those who want extra longevity

What's Included

3 Filter Cartridge #1 (White) and 1 Filter Cartridge #2 (Black)

How to Replace

After replacing both filters once, replace just the white filters 2 more times—for a total of 3 replacements

Cost per Replacement

$19.99

From the Experts

"The Weddell Duo shower filter got the highest contaminant reduction score of all the shower filters we tested. It also scored well for its filtration rate, design quality, and setup and maintenance requirements, awarding it the highest overall score and making it the shower best filter we tested."

"The Weddell Duo is the best shower filter overall, and the only one tested and verified to remove PFAS, microplastics, and chlorine. It’s the shower filter that removes the most contaminants. What a relief! I use it in my own bathroom."

"Weddell Duo is the only shower filter on the market to be NSF certified and verified to reduce PFAS. It not only meets rigorous industry standards but also addresses real concerns about harmful contaminants that can affect your health."

"When it comes to shower filters, I didn’t really think there was much difference from one shower filter to the next. But when I started using the Weddell Duo I quickly found out I was wrong.“

Replacement Cartridges FAQs

How often do I need to replace the filter cartridges?

You should change your filters if any of the following occurs: 1) 5-6 months has passed, 2) you notice decreased water pressure and/or filter discoloration, or 3) when the rated capacity of the filter cartridge has been reached.

The frequency of replacement depends on your water usage and the quality of your water supply. Regular replacement ensures that your shower water remains clean and safe.

How do I replace the filters?

Replacing the filters is easy! The Weddell Duo's clear dual-cartridge system allows you to monitor their condition. Simply remove the filter cartridges chambers by gently turning them counter clockwise twist and replace. No tools are required.

For additional help, please watch our replacement guide video here.

Why are my filters slowing down before the suggested lifespan?

Factors like hard or highly contaminated tap water, heavy sediment, or frequent use can cause your filters to slow down sooner than expected. This is because the filters are capturing more material than typical municipal water, and as it works harder to remove contaminants, the available space for water to pass through becomes filled. While the water flow may slow, this doesn’t mean the filters are defective—it means it’s doing its job effectively. The more contaminants and materials it captures, the sooner it will need to be replaced.

Do the filters remove the same contaminants regardless of which set I buy?

Yes, all our replacement filters are designed to provide the same high level of filtration, removing chlorine, PFAS, and particulates while maintaining excellent water flow.

What’s the difference between the three types of replacement filters?

  • Full Set: Includes just one full set of filters (1 black and 1 white) for a single replacement.
  • Twin Pack Replacement Cartridges: Includes two full sets of filters (2 black and 2 white), providing two full replacements.
  • Full Set + Extra Filters: Includes one full set of filters (1 black and 1 white) plus two extra white sediment filters, offering three replacements in total.

Customer Reviews

Based on 56 reviews
88%
(49)
7%
(4)
4%
(2)
0%
(0)
2%
(1)
s
susie
Happy with the product.

I have noticed a difference in my hair after installing. I go through filters rather fast and the cost adds up quickly at $30 a set.

R
Rosa M Rodriguez Diaz
Evidence that my water is unhealthy

I bought these filters because they are NSF certified & everyone (even in my far far away country) is raving about them. I had used shower filters all my life. However, it has been the first time I'm able to witness (due to one side of this filter clear compartment) how fast harmful substances are accumulated. I was aware that in my current city the quality of the water below average & contaminated with PFAS. Also, I know that I'm living in a house with very old pipes. But it wasn't until the Weddell Filter that I comprehended the seriousness of the matter. My white side filter turns brown, yes brown, in less than a week from installation. That got me really scared as skin is our largest organ. Since as of now I'm unable to move to a better house this filter has been a blessing. My strategy has been changing the white side at least every two weeks. This is substantially lowering all the toxins I was getting onto my skin & giving me some peace of mind until I can move out of here. The 1 gray side with 3 white sides bundle is my "not so expensive" approach. During the initial week when the white side has not been invaded with toxins my hair & skin look and feel luminous, soft, nourished & deeply hydrated. I truly recommend this filter; specially for using it for bathing babies & people with skin-related illnesses. Hopefully this brand keeps expanding their products and creates an "extra strength" filter with more capacity for situations of enormous amounts of toxins.

V
V.I.

Amazing service, was greatly impressed. Fikter itself does the great work. Before been using different( quite popular) kind of another brand, and the quality of Weddell is way way superiour to say least. Thank you guys for a great work!

L
Laura
Great customer service

I live in an apartment in an old turn of the century house and had been happily using the Weddell Duo shower filter, which was giving me piece of mind. The water heater broke down and so a new one was installed. During the installation process heavy sediment appeared to be released as immediately following I began to lose water pressure, clogging up my new replacement Weddell filter cartridges in a matter of days. I was so upset - it got to the point that I barely had enough water pressure to shower, and I did not want to remove the filters and shower without them. I reached out to customer service to see if they recommended I replace both cartridges or if I could get away with just replacing the sediment filter. They promptly replied and educated me on what could have happened. They also suggested that I replace the sediment filter, then sent me a 4 pack replacement bundle FREE OF CHARGE. This was above and beyond what I was expecting. I was so happy to receive my delivery. Unfortunately I am continuing to experience sediment problems, but will be ordering a larger replacement bundle to make things more cost effective.. Very impressed with this company, from the quality of their product to their customer service. I will continue to recommend the Weddell Duo Shower filter to my friends and family.

J
Joe Waldner III
Installed easy and working great

Only weird thing is that the white filter turned brown within the first day. It was brand new and just makes it seem dirty? I saw that color change was normal and not reason to replace but it just struck me as strange